The first step is to pour cake drip around the rim of your martini glasses. It needs time to dry, so you might want to do this the day before.
Add two drops of green coloring in vodka in a small container, stir to dissolve.
Place ice cubes in a bar glass or cocktail shaker. Pour in the green vodka, chocolate liqueur, and crème de menthe.
Stir with a bar spoon to combine. Adjust the color if needed.
Pour into the prepared martini glasses and garnish with two maraschino cherries on a cocktail pick. Serve immediately.
Notes
Important Tip: the cake drip will continue to run down the glass if you do not tilt and move the glass in a spiral, downward motion until it starts to set.